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TDA2: HDMI signals are not connected via companion IC TPD12S016RKTR

CTY Lim
Prodigy 180 points
Part Number: TDA2
Other Parts Discussed in Thread: TPD1E05U06

Is there any special reason why HDMI differential signal pairs CPU_HDMI_TX[0-2] and CPU_HDMI_TXC do not go through companion IC TPD12S016RKTR prior to external connector?

  • 0
    TI__Genius 12455 points
    Hi Lim,

    Let me check on the reason and get back to you.

    Regards,
    Sujith
  • 0
    TI__Mastermind 44270 points

    The TPD12S016RKTR had too much capacitance for the TDA2 HDMI signals, and could not meet the HDMI electrical specifications.  TPS12S016 data sheets states typical capacitance is 1.2pF.  The ESD components used on the EVM (TPD1E05U06) has typical capacitance of 0.42pF.  Additionally, the EVM implements voids in the ground plane beneath the ESD diodes to minimize the capacitance even more.

    Thanks

    Robert